prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Write tests for bokeh templating software
  With the merge of #459, bokeh templating will be implemented for `jwql`.  We should address the test coverage for this software. 
  
  </issue>
  <code>
  [start of jwql/bokeh_templating/example/main.py]
  1 """
  2 This is a minimal example demonstrating how to create a Bokeh app using
  3 the ``bokeh-templating`` package and the associated YAML template files.
  4 
  5 Author
  6 -------
  7 
  8     - Graham Kanarek
  9 
  10 Dependencies
  11 ------------
  12 
  13     The user must have PyYAML, Bokeh, and the ``bokeh-templating``
  14     packages installed.
  15 """
  16 
  17 import os
  18 import numpy as np
  19 
  20 from jwql.bokeh_templating import BokehTemplate
  21 
  22 file_dir = os.path.dirname(os.path.realpath(__file__))
  23 
  24 
  25 class TestBokehApp(BokehTemplate):
  26     """This is a minimal ``BokehTemplate`` app."""
  27 
  28     def pre_init(self):
  29         """Before creating the Bokeh interface (by parsing the interface
  30         file), we must initialize our ``a`` and ``b`` variables, and set
  31         the path to the interface file.
  32         """
  33 
  34         self.a, self.b = 4, 2
  35 
  36         self.format_string = None
  37         self.interface_file = os.path.join(file_dir, "example_interface.yaml")
  38 
  39     # No post-initialization tasks are required.
  40     post_init = None
  41 
  42     @property
  43     def x(self):
  44         """The x-value of the Lissajous curves."""
  45         return 4. * np.sin(self.a * np.linspace(0, 2 * np.pi, 500))
  46 
  47     @property
  48     def y(self):
  49         """The y-value of the Lissajous curves."""
  50         return 3. * np.sin(self.b * np.linspace(0, 2 * np.pi, 500))
  51 
  52     def controller(self, attr, old, new):
  53         """This is the controller function which is used to update the
  54         curves when the sliders are adjusted. Note the use of the
  55         ``self.refs`` dictionary for accessing the Bokeh object
  56         attributes."""
  57         self.a = self.refs["a_slider"].value
  58         self.b = self.refs["b_slider"].value
  59 
  60         self.refs["figure_source"].data = {'x': self.x, 'y': self.y}
  61 
  62 
  63 TestBokehApp()
  64
  [end of jwql/bokeh_templating/example/main.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/jwql/bokeh_templating/example/main.py b/jwql/bokeh_templating/example/main.py
  --- a/jwql/bokeh_templating/example/main.py
  +++ b/jwql/bokeh_templating/example/main.py
  @@ -24,6 +24,8 @@
   
   class TestBokehApp(BokehTemplate):
       """This is a minimal ``BokehTemplate`` app."""
  +    
  +    _embed = True
   
       def pre_init(self):
           """Before creating the Bokeh interface (by parsing the interface
  
verification_info: {"golden_diff": "diff --git a/jwql/bokeh_templating/example/main.py b/jwql/bokeh_templating/example/main.py\n--- a/jwql/bokeh_templating/example/main.py\n+++ b/jwql/bokeh_templating/example/main.py\n@@ -24,6 +24,8 @@\n \n class TestBokehApp(BokehTemplate):\n     \"\"\"This is a minimal ``BokehTemplate`` app.\"\"\"\n+    \n+    _embed = True\n \n     def pre_init(self):\n         \"\"\"Before creating the Bokeh interface (by parsing the interface\n", "issue": "Write tests for bokeh templating software\nWith the merge of #459, bokeh templating will be implemented for `jwql`.  We should address the test coverage for this software. \n", "before_files": [{"content": "\"\"\"\nThis is a minimal example demonstrating how to create a Bokeh app using\nthe ``bokeh-templating`` package and the associated YAML template files.\n\nAuthor\n-------\n\n    - Graham Kanarek\n\nDependencies\n------------\n\n    The user must have PyYAML, Bokeh, and the ``bokeh-templating``\n    packages installed.\n\"\"\"\n\nimport os\nimport numpy as np\n\nfrom jwql.bokeh_templating import BokehTemplate\n\nfile_dir = os.path.dirname(os.path.realpath(__file__))\n\n\nclass TestBokehApp(BokehTemplate):\n    \"\"\"This is a minimal ``BokehTemplate`` app.\"\"\"\n\n    def pre_init(self):\n        \"\"\"Before creating the Bokeh interface (by parsing the interface\n        file), we must initialize our ``a`` and ``b`` variables, and set\n        the path to the interface file.\n        \"\"\"\n\n        self.a, self.b = 4, 2\n\n        self.format_string = None\n        self.interface_file = os.path.join(file_dir, \"example_interface.yaml\")\n\n    # No post-initialization tasks are required.\n    post_init = None\n\n    @property\n    def x(self):\n        \"\"\"The x-value of the Lissajous curves.\"\"\"\n        return 4. * np.sin(self.a * np.linspace(0, 2 * np.pi, 500))\n\n    @property\n    def y(self):\n        \"\"\"The y-value of the Lissajous curves.\"\"\"\n        return 3. * np.sin(self.b * np.linspace(0, 2 * np.pi, 500))\n\n    def controller(self, attr, old, new):\n        \"\"\"This is the controller function which is used to update the\n        curves when the sliders are adjusted. Note the use of the\n        ``self.refs`` dictionary for accessing the Bokeh object\n        attributes.\"\"\"\n        self.a = self.refs[\"a_slider\"].value\n        self.b = self.refs[\"b_slider\"].value\n\n        self.refs[\"figure_source\"].data = {'x': self.x, 'y': self.y}\n\n\nTestBokehApp()\n", "path": "jwql/bokeh_templating/example/main.py"}]}