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</pre></div><pre class="rust"><code><span class="doccomment">//! # json module
//!
//! `json` is in charge of generating a flat BTreeMap like . serperated hierarchical
//! JSON output. This is used by some metric parsing systems when running a command.

</span><span class="kw">use </span>std::collections::BTreeMap;
<span class="kw">use </span>std::collections::HashMap;

<span class="kw">use </span>tracing::debug;

<span class="kw">use </span><span class="kw">crate</span>::networkd;
<span class="kw">use </span><span class="kw">crate</span>::pid1;
<span class="kw">use </span><span class="kw">crate</span>::units;
<span class="kw">use </span><span class="kw">crate</span>::MachineStats;
<span class="kw">use </span><span class="kw">crate</span>::MonitordStats;

<span class="doccomment">/// Add a prefix if config wants contains one
</span><span class="kw">fn </span>gen_base_metric_key(key_prefix: <span class="kw-2">&amp;</span>String, metric_name: <span class="kw-2">&amp;</span>str) -&gt; String {
    <span class="kw">match </span>key_prefix.is_empty() {
        <span class="bool-val">true </span>=&gt; String::from(metric_name),
        <span class="bool-val">false </span>=&gt; <span class="macro">format!</span>(<span class="string">"{}.{}"</span>, key_prefix, metric_name),
    }
}

<span class="kw">fn </span>flatten_networkd(
    networkd_stats: <span class="kw-2">&amp;</span>networkd::NetworkdState,
    key_prefix: <span class="kw-2">&amp;</span>String,
) -&gt; BTreeMap&lt;String, serde_json::Value&gt; {
    <span class="kw">let </span><span class="kw-2">mut </span>flat_stats: BTreeMap&lt;String, serde_json::Value&gt; = BTreeMap::new();
    <span class="kw">let </span>base_metric_name = gen_base_metric_key(key_prefix, <span class="kw-2">&amp;</span>String::from(<span class="string">"networkd"</span>));

    <span class="kw">let </span>managed_interfaces_key = <span class="macro">format!</span>(<span class="string">"{}.managed_interfaces"</span>, base_metric_name);
    flat_stats.insert(
        managed_interfaces_key,
        networkd_stats.managed_interfaces.into(),
    );

    <span class="kw">if </span>networkd_stats.interfaces_state.is_empty() {
        <span class="macro">debug!</span>(<span class="string">"No networkd interfaces to add to flat JSON"</span>);
        <span class="kw">return </span>flat_stats;
    }

    <span class="kw">for </span>interface <span class="kw">in </span><span class="kw-2">&amp;</span>networkd_stats.interfaces_state {
        <span class="kw">let </span>interface_base = <span class="macro">format!</span>(<span class="string">"{}.{}"</span>, base_metric_name, interface.name);
        flat_stats.insert(
            <span class="macro">format!</span>(<span class="string">"{interface_base}.address_state"</span>),
            (interface.address_state <span class="kw">as </span>u64).into(),
        );
        flat_stats.insert(
            <span class="macro">format!</span>(<span class="string">"{interface_base}.admin_state"</span>),
            (interface.admin_state <span class="kw">as </span>u64).into(),
        );
        flat_stats.insert(
            <span class="macro">format!</span>(<span class="string">"{interface_base}.carrier_state"</span>),
            (interface.carrier_state <span class="kw">as </span>u64).into(),
        );
        flat_stats.insert(
            <span class="macro">format!</span>(<span class="string">"{interface_base}.ipv4_address_state"</span>),
            (interface.ipv4_address_state <span class="kw">as </span>u64).into(),
        );
        flat_stats.insert(
            <span class="macro">format!</span>(<span class="string">"{interface_base}.ipv6_address_state"</span>),
            (interface.ipv6_address_state <span class="kw">as </span>u64).into(),
        );
        flat_stats.insert(
            <span class="macro">format!</span>(<span class="string">"{interface_base}.oper_state"</span>),
            (interface.oper_state <span class="kw">as </span>u64).into(),
        );
        flat_stats.insert(
            <span class="macro">format!</span>(<span class="string">"{interface_base}.required_for_online"</span>),
            (interface.required_for_online <span class="kw">as </span>u64).into(),
        );
    }
    flat_stats
}

<span class="kw">fn </span>flatten_pid1(
    optional_pid1_stats: <span class="kw-2">&amp;</span><span class="prelude-ty">Option</span>&lt;pid1::Pid1Stats&gt;,
    key_prefix: <span class="kw-2">&amp;</span>String,
) -&gt; BTreeMap&lt;String, serde_json::Value&gt; {
    <span class="kw">let </span><span class="kw-2">mut </span>flat_stats: BTreeMap&lt;String, serde_json::Value&gt; = BTreeMap::new();
    <span class="comment">// If we're not collcting pid1 stats don't add
    </span><span class="kw">let </span>pid1_stats = <span class="kw">match </span>optional_pid1_stats {
        <span class="prelude-val">Some</span>(ps) =&gt; ps,
        <span class="prelude-val">None </span>=&gt; {
            <span class="macro">debug!</span>(<span class="string">"Skipping flatenning pid1 stats as we got None ..."</span>);
            <span class="kw">return </span>flat_stats;
        }
    };

    <span class="kw">let </span>base_metric_name = gen_base_metric_key(key_prefix, <span class="kw-2">&amp;</span>String::from(<span class="string">"pid1"</span>));

    flat_stats.insert(
        <span class="macro">format!</span>(<span class="string">"{}.cpu_time_kernel"</span>, base_metric_name),
        pid1_stats.cpu_time_kernel.into(),
    );
    flat_stats.insert(
        <span class="macro">format!</span>(<span class="string">"{}.cpu_user_kernel"</span>, base_metric_name),
        pid1_stats.cpu_time_user.into(),
    );
    flat_stats.insert(
        <span class="macro">format!</span>(<span class="string">"{}.memory_usage_bytes"</span>, base_metric_name),
        pid1_stats.memory_usage_bytes.into(),
    );
    flat_stats.insert(
        <span class="macro">format!</span>(<span class="string">"{}.fd_count"</span>, base_metric_name),
        pid1_stats.fd_count.into(),
    );
    flat_stats.insert(
        <span class="macro">format!</span>(<span class="string">"{}.tasks"</span>, base_metric_name),
        pid1_stats.tasks.into(),
    );

    flat_stats
}

<span class="kw">fn </span>flatten_services(
    service_stats_hash: <span class="kw-2">&amp;</span>HashMap&lt;String, units::ServiceStats&gt;,
    key_prefix: <span class="kw-2">&amp;</span>String,
) -&gt; BTreeMap&lt;String, serde_json::Value&gt; {
    <span class="kw">let </span><span class="kw-2">mut </span>flat_stats: BTreeMap&lt;String, serde_json::Value&gt; = BTreeMap::new();
    <span class="kw">let </span>base_metric_name = gen_base_metric_key(key_prefix, <span class="kw-2">&amp;</span>String::from(<span class="string">"services"</span>));

    <span class="kw">for </span>(service_name, service_stats) <span class="kw">in </span>service_stats_hash.iter() {
        <span class="kw">for </span>field_name <span class="kw">in </span>units::SERVICE_FIELD_NAMES {
            <span class="kw">let </span>key = <span class="macro">format!</span>(<span class="string">"{base_metric_name}.{service_name}.{field_name}"</span>);
            <span class="kw">match </span>field_name.to_string().as_str() {
                <span class="string">"active_enter_timestamp" </span>=&gt; {
                    flat_stats.insert(key, service_stats.active_enter_timestamp.into());
                }
                <span class="string">"active_exit_timestamp" </span>=&gt; {
                    flat_stats.insert(key, service_stats.active_exit_timestamp.into());
                }
                <span class="string">"cpuusage_nsec" </span>=&gt; {
                    flat_stats.insert(key, service_stats.cpuusage_nsec.into());
                }
                <span class="string">"inactive_exit_timestamp" </span>=&gt; {
                    flat_stats.insert(key, service_stats.inactive_exit_timestamp.into());
                }
                <span class="string">"ioread_bytes" </span>=&gt; {
                    flat_stats.insert(key, service_stats.ioread_bytes.into());
                }
                <span class="string">"ioread_operations" </span>=&gt; {
                    flat_stats.insert(key, service_stats.ioread_operations.into());
                }
                <span class="string">"memory_available" </span>=&gt; {
                    flat_stats.insert(key, service_stats.memory_available.into());
                }
                <span class="string">"memory_current" </span>=&gt; {
                    flat_stats.insert(key, service_stats.memory_current.into());
                }
                <span class="string">"nrestarts" </span>=&gt; {
                    flat_stats.insert(key, service_stats.nrestarts.into());
                }
                <span class="string">"processes" </span>=&gt; {
                    flat_stats.insert(key, service_stats.processes.into());
                }
                <span class="string">"restart_usec" </span>=&gt; {
                    flat_stats.insert(key, service_stats.restart_usec.into());
                }
                <span class="string">"state_change_timestamp" </span>=&gt; {
                    flat_stats.insert(key, service_stats.state_change_timestamp.into());
                }
                <span class="string">"status_errno" </span>=&gt; {
                    flat_stats.insert(key, service_stats.status_errno.into());
                }
                <span class="string">"tasks_current" </span>=&gt; {
                    flat_stats.insert(key, service_stats.tasks_current.into());
                }
                <span class="string">"timeout_clean_usec" </span>=&gt; {
                    flat_stats.insert(key, service_stats.timeout_clean_usec.into());
                }
                <span class="string">"watchdog_usec" </span>=&gt; {
                    flat_stats.insert(key, service_stats.watchdog_usec.into());
                }
                <span class="kw">_ </span>=&gt; {
                    <span class="macro">debug!</span>(<span class="string">"Got a unhandled stat: '{}'"</span>, field_name);
                }
            }
        }
    }
    flat_stats
}

<span class="kw">fn </span>flatten_unit_states(
    unit_states_hash: <span class="kw-2">&amp;</span>HashMap&lt;String, units::UnitStates&gt;,
    key_prefix: <span class="kw-2">&amp;</span>String,
) -&gt; BTreeMap&lt;String, serde_json::Value&gt; {
    <span class="kw">let </span><span class="kw-2">mut </span>flat_stats: BTreeMap&lt;String, serde_json::Value&gt; = BTreeMap::new();
    <span class="kw">let </span>base_metric_name = gen_base_metric_key(key_prefix, <span class="kw-2">&amp;</span>String::from(<span class="string">"unit_states"</span>));

    <span class="kw">for </span>(unit_name, unit_state_stats) <span class="kw">in </span>unit_states_hash.iter() {
        <span class="kw">for </span>field_name <span class="kw">in </span>units::UNIT_STATES_FIELD_NAMES {
            <span class="kw">let </span>key = <span class="macro">format!</span>(<span class="string">"{base_metric_name}.{unit_name}.{field_name}"</span>);
            <span class="kw">match </span>field_name.to_string().as_str() {
                <span class="string">"active_state" </span>=&gt; {
                    flat_stats.insert(key, (unit_state_stats.active_state <span class="kw">as </span>u64).into());
                }
                <span class="string">"load_state" </span>=&gt; {
                    flat_stats.insert(key, (unit_state_stats.load_state <span class="kw">as </span>u64).into());
                }
                <span class="string">"unhealthy" </span>=&gt; <span class="kw">match </span>unit_state_stats.unhealthy {
                    <span class="bool-val">false </span>=&gt; {
                        flat_stats.insert(key, <span class="number">0</span>.into());
                    }
                    <span class="bool-val">true </span>=&gt; {
                        flat_stats.insert(key, <span class="number">1</span>.into());
                    }
                },
                <span class="kw">_ </span>=&gt; {
                    <span class="macro">debug!</span>(<span class="string">"Got a unhandled unit state: '{}'"</span>, field_name);
                }
            }
        }
    }

    flat_stats
}

<span class="kw">fn </span>flatten_units(
    units_stats: <span class="kw-2">&amp;</span>units::SystemdUnitStats,
    key_prefix: <span class="kw-2">&amp;</span>String,
) -&gt; BTreeMap&lt;String, serde_json::Value&gt; {
    <span class="comment">// fields of the SystemdUnitStats struct we know to ignore so don't log below
    </span><span class="kw">let </span>fields_to_ignore = Vec::from([<span class="string">"service_stats"</span>]);

    <span class="kw">let </span><span class="kw-2">mut </span>flat_stats: BTreeMap&lt;String, serde_json::Value&gt; = BTreeMap::new();
    <span class="kw">let </span>base_metric_name = gen_base_metric_key(key_prefix, <span class="kw-2">&amp;</span>String::from(<span class="string">"units"</span>));

    <span class="comment">// TODO: Work out a smarter way to do this rather than hard code mappings
    </span><span class="kw">for </span>field_name <span class="kw">in </span>units::UNIT_FIELD_NAMES {
        <span class="kw">let </span>key = <span class="macro">format!</span>(<span class="string">"{base_metric_name}.{field_name}"</span>);
        <span class="kw">match </span>field_name.to_string().as_str() {
            <span class="string">"active_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.active_units.into());
            }
            <span class="string">"automount_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.automount_units.into());
            }
            <span class="string">"device_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.device_units.into());
            }
            <span class="string">"failed_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.failed_units.into());
            }
            <span class="string">"inactive_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.inactive_units.into());
            }
            <span class="string">"jobs_queued" </span>=&gt; {
                flat_stats.insert(key, units_stats.jobs_queued.into());
            }
            <span class="string">"loaded_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.loaded_units.into());
            }
            <span class="string">"masked_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.masked_units.into());
            }
            <span class="string">"mount_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.mount_units.into());
            }
            <span class="string">"not_found_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.not_found_units.into());
            }
            <span class="string">"path_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.path_units.into());
            }
            <span class="string">"scope_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.scope_units.into());
            }
            <span class="string">"service_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.service_units.into());
            }
            <span class="string">"slice_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.slice_units.into());
            }
            <span class="string">"socket_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.socket_units.into());
            }
            <span class="string">"target_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.target_units.into());
            }
            <span class="string">"timer_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.timer_units.into());
            }
            <span class="string">"total_units" </span>=&gt; {
                flat_stats.insert(key, units_stats.total_units.into());
            }
            <span class="kw">_ </span>=&gt; {
                <span class="kw">if </span>!fields_to_ignore.contains(field_name) {
                    <span class="macro">debug!</span>(<span class="string">"Got a unhandled stat '{}'"</span>, field_name);
                }
            }
        };
    }
    flat_stats
}

<span class="kw">fn </span>flatten_machines(
    machines_stats: <span class="kw-2">&amp;</span>HashMap&lt;String, MachineStats&gt;,
    key_prefix: <span class="kw-2">&amp;</span>String,
) -&gt; BTreeMap&lt;String, serde_json::Value&gt; {
    <span class="kw">let </span><span class="kw-2">mut </span>flat_stats = BTreeMap::new();

    <span class="kw">if </span>machines_stats.is_empty() {
        <span class="kw">return </span>flat_stats;
    }

    <span class="kw">for </span>(machine, stats) <span class="kw">in </span>machines_stats {
        <span class="kw">let </span>machine_key_prefix = <span class="kw">match </span>key_prefix.is_empty() {
            <span class="bool-val">true </span>=&gt; <span class="macro">format!</span>(<span class="string">"machines.{}"</span>, machine),
            <span class="bool-val">false </span>=&gt; <span class="macro">format!</span>(<span class="string">"{}.machines.{}"</span>, key_prefix, machine),
        };
        flat_stats.extend(flatten_networkd(<span class="kw-2">&amp;</span>stats.networkd, <span class="kw-2">&amp;</span>machine_key_prefix));
        flat_stats.extend(flatten_units(<span class="kw-2">&amp;</span>stats.units, <span class="kw-2">&amp;</span>machine_key_prefix));
        flat_stats.extend(flatten_pid1(<span class="kw-2">&amp;</span>stats.pid1, <span class="kw-2">&amp;</span>machine_key_prefix));
        flat_stats.insert(
            gen_base_metric_key(<span class="kw-2">&amp;</span>machine_key_prefix, <span class="kw-2">&amp;</span>String::from(<span class="string">"system-state"</span>)),
            (stats.system_state <span class="kw">as </span>u64).into(),
        );
        flat_stats.extend(flatten_services(
            <span class="kw-2">&amp;</span>stats.units.service_stats,
            <span class="kw-2">&amp;</span>machine_key_prefix,
        ));
    }

    flat_stats
}

<span class="doccomment">/// Take the standard returned structs and move all to a flat BTreeMap&lt;str, float|int&gt; like JSON
</span><span class="kw">fn </span>flatten_stats(
    stats_struct: <span class="kw-2">&amp;</span>MonitordStats,
    key_prefix: <span class="kw-2">&amp;</span>String,
) -&gt; BTreeMap&lt;String, serde_json::Value&gt; {
    <span class="kw">let </span><span class="kw-2">mut </span>flat_stats: BTreeMap&lt;String, serde_json::Value&gt; = BTreeMap::new();
    flat_stats.extend(flatten_networkd(<span class="kw-2">&amp;</span>stats_struct.networkd, key_prefix));
    flat_stats.extend(flatten_pid1(<span class="kw-2">&amp;</span>stats_struct.pid1, key_prefix));
    flat_stats.insert(
        gen_base_metric_key(key_prefix, <span class="kw-2">&amp;</span>String::from(<span class="string">"system-state"</span>)),
        (stats_struct.system_state <span class="kw">as </span>u64).into(),
    );
    flat_stats.extend(flatten_services(
        <span class="kw-2">&amp;</span>stats_struct.units.service_stats,
        key_prefix,
    ));
    flat_stats.extend(flatten_unit_states(
        <span class="kw-2">&amp;</span>stats_struct.units.unit_states,
        key_prefix,
    ));
    flat_stats.extend(flatten_units(<span class="kw-2">&amp;</span>stats_struct.units, key_prefix));
    flat_stats.insert(
        gen_base_metric_key(key_prefix, <span class="kw-2">&amp;</span>String::from(<span class="string">"version"</span>)),
        stats_struct.version.to_string().into(),
    );
    flat_stats.extend(flatten_machines(<span class="kw-2">&amp;</span>stats_struct.machines, key_prefix));
    flat_stats
}

<span class="doccomment">/// Take the standard returned structs and move all to a flat JSON str
</span><span class="kw">pub fn </span>flatten(
    stats_struct: <span class="kw-2">&amp;</span>MonitordStats,
    key_prefix: <span class="kw-2">&amp;</span>String,
) -&gt; <span class="prelude-ty">Result</span>&lt;String, serde_json::Error&gt; {
    serde_json::to_string_pretty(<span class="kw-2">&amp;</span>flatten_stats(stats_struct, key_prefix))
}

<span class="attr">#[cfg(test)]
</span><span class="kw">mod </span>tests {
    <span class="kw">use super</span>::<span class="kw-2">*</span>;

    <span class="comment">// This will always be sorted / deterministic ...
    </span><span class="kw">const </span>EXPECTED_FLAT_JSON: <span class="kw-2">&amp;</span>str = <span class="string">r###"{
  "machines.foo.networkd.managed_interfaces": 0,
  "machines.foo.system-state": 0,
  "machines.foo.units.active_units": 0,
  "machines.foo.units.automount_units": 0,
  "machines.foo.units.device_units": 0,
  "machines.foo.units.failed_units": 0,
  "machines.foo.units.inactive_units": 0,
  "machines.foo.units.jobs_queued": 0,
  "machines.foo.units.loaded_units": 0,
  "machines.foo.units.masked_units": 0,
  "machines.foo.units.mount_units": 0,
  "machines.foo.units.not_found_units": 0,
  "machines.foo.units.path_units": 0,
  "machines.foo.units.scope_units": 0,
  "machines.foo.units.service_units": 0,
  "machines.foo.units.slice_units": 0,
  "machines.foo.units.socket_units": 0,
  "machines.foo.units.target_units": 0,
  "machines.foo.units.timer_units": 0,
  "machines.foo.units.total_units": 0,
  "networkd.eth0.address_state": 3,
  "networkd.eth0.admin_state": 4,
  "networkd.eth0.carrier_state": 5,
  "networkd.eth0.ipv4_address_state": 3,
  "networkd.eth0.ipv6_address_state": 2,
  "networkd.eth0.oper_state": 9,
  "networkd.eth0.required_for_online": 1,
  "networkd.managed_interfaces": 1,
  "pid1.cpu_time_kernel": 69,
  "pid1.cpu_user_kernel": 69,
  "pid1.fd_count": 69,
  "pid1.memory_usage_bytes": 69,
  "pid1.tasks": 1,
  "services.unittest.service.active_enter_timestamp": 0,
  "services.unittest.service.active_exit_timestamp": 0,
  "services.unittest.service.cpuusage_nsec": 0,
  "services.unittest.service.inactive_exit_timestamp": 0,
  "services.unittest.service.ioread_bytes": 0,
  "services.unittest.service.ioread_operations": 0,
  "services.unittest.service.memory_available": 0,
  "services.unittest.service.memory_current": 0,
  "services.unittest.service.nrestarts": 0,
  "services.unittest.service.processes": 0,
  "services.unittest.service.restart_usec": 0,
  "services.unittest.service.state_change_timestamp": 0,
  "services.unittest.service.status_errno": -69,
  "services.unittest.service.tasks_current": 0,
  "services.unittest.service.timeout_clean_usec": 0,
  "services.unittest.service.watchdog_usec": 0,
  "system-state": 3,
  "unit_states.nvme\\x2dWDC_CL_SN730_SDBQNTY\\x2d512G\\x2d2020_37222H80070511\\x2dpart3.device.active_state": 1,
  "unit_states.nvme\\x2dWDC_CL_SN730_SDBQNTY\\x2d512G\\x2d2020_37222H80070511\\x2dpart3.device.load_state": 1,
  "unit_states.nvme\\x2dWDC_CL_SN730_SDBQNTY\\x2d512G\\x2d2020_37222H80070511\\x2dpart3.device.unhealthy": 0,
  "unit_states.unittest.service.active_state": 1,
  "unit_states.unittest.service.load_state": 1,
  "unit_states.unittest.service.unhealthy": 0,
  "units.active_units": 0,
  "units.automount_units": 0,
  "units.device_units": 0,
  "units.failed_units": 0,
  "units.inactive_units": 0,
  "units.jobs_queued": 0,
  "units.loaded_units": 0,
  "units.masked_units": 0,
  "units.mount_units": 0,
  "units.not_found_units": 0,
  "units.path_units": 0,
  "units.scope_units": 0,
  "units.service_units": 0,
  "units.slice_units": 0,
  "units.socket_units": 0,
  "units.target_units": 0,
  "units.timer_units": 0,
  "units.total_units": 0,
  "version": "255.7-1.fc40"
}"###</span>;

    <span class="kw">fn </span>return_monitord_stats() -&gt; MonitordStats {
        <span class="kw">let </span><span class="kw-2">mut </span>stats = MonitordStats {
            networkd: networkd::NetworkdState {
                interfaces_state: <span class="macro">vec!</span>[networkd::InterfaceState {
                    address_state: networkd::AddressState::routable,
                    admin_state: networkd::AdminState::configured,
                    carrier_state: networkd::CarrierState::carrier,
                    ipv4_address_state: networkd::AddressState::routable,
                    ipv6_address_state: networkd::AddressState::degraded,
                    name: <span class="string">"eth0"</span>.to_string(),
                    network_file: <span class="string">"/etc/systemd/network/69-eno4.network"</span>.to_string(),
                    oper_state: networkd::OperState::routable,
                    required_for_online: networkd::BoolState::True,
                }],
                managed_interfaces: <span class="number">1</span>,
            },
            pid1: <span class="prelude-val">Some</span>(<span class="kw">crate</span>::pid1::Pid1Stats {
                cpu_time_kernel: <span class="number">69</span>,
                cpu_time_user: <span class="number">69</span>,
                memory_usage_bytes: <span class="number">69</span>,
                fd_count: <span class="number">69</span>,
                tasks: <span class="number">1</span>,
            }),
            system_state: <span class="kw">crate</span>::system::SystemdSystemState::running,
            units: <span class="kw">crate</span>::units::SystemdUnitStats::default(),
            version: String::from(<span class="string">"255.7-1.fc40"</span>)
                .try_into()
                .expect(<span class="string">"Unable to make SystemdVersion struct"</span>),
            machines: HashMap::from([(String::from(<span class="string">"foo"</span>), MachineStats::default())]),
        };
        <span class="kw">let </span>service_unit_name = String::from(<span class="string">"unittest.service"</span>);
        stats.units.service_stats.insert(
            service_unit_name.clone(),
            units::ServiceStats {
                <span class="comment">// Ensure json-flat handles negative i32s
                </span>status_errno: -<span class="number">69</span>,
                ..Default::default()
            },
        );
        stats.units.unit_states.insert(
            String::from(<span class="string">"unittest.service"</span>),
            units::UnitStates {
                active_state: units::SystemdUnitActiveState::active,
                load_state: units::SystemdUnitLoadState::loaded,
                unhealthy: <span class="bool-val">false</span>,
            },
        );
        <span class="comment">// Ensure we escape keys correctly
        </span>stats.units.unit_states.insert(
            String::from(
                <span class="string">r"nvme\x2dWDC_CL_SN730_SDBQNTY\x2d512G\x2d2020_37222H80070511\x2dpart3.device"</span>,
            ),
            units::UnitStates {
                active_state: units::SystemdUnitActiveState::active,
                load_state: units::SystemdUnitLoadState::loaded,
                unhealthy: <span class="bool-val">false</span>,
            },
        );
        stats
    }

    <span class="attr">#[test]
    </span><span class="kw">fn </span>test_flatten_map() {
        <span class="kw">let </span>json_flat_map = flatten_stats(
            <span class="kw-2">&amp;</span>return_monitord_stats(),
            <span class="kw-2">&amp;</span>String::from(<span class="string">"JSON serialize failed"</span>),
        );
        <span class="macro">assert_eq!</span>(<span class="number">75</span>, json_flat_map.len());
    }

    <span class="attr">#[test]
    </span><span class="kw">fn </span>test_flatten() {
        <span class="kw">let </span>json_flat =
            flatten(<span class="kw-2">&amp;</span>return_monitord_stats(), <span class="kw-2">&amp;</span>String::from(<span class="string">""</span>)).expect(<span class="string">"JSON serialize failed"</span>);
        <span class="macro">assert_eq!</span>(EXPECTED_FLAT_JSON, json_flat);
    }

    <span class="attr">#[test]
    </span><span class="kw">fn </span>test_flatten_prefixed() {
        <span class="kw">let </span>json_flat = flatten(<span class="kw-2">&amp;</span>return_monitord_stats(), <span class="kw-2">&amp;</span>String::from(<span class="string">"monitord"</span>))
            .expect(<span class="string">"JSON serialize failed"</span>);
        <span class="kw">let </span>json_flat_unserialized: BTreeMap&lt;String, serde_json::Value&gt; =
            serde_json::from_str(<span class="kw-2">&amp;</span>json_flat).expect(<span class="string">"JSON from_str failed"</span>);
        <span class="kw">for </span>(key, _value) <span class="kw">in </span>json_flat_unserialized.iter() {
            <span class="macro">assert!</span>(key.starts_with(<span class="string">"monitord."</span>));
        }
    }
}
</code></pre></div></section></main></body></html>