Add device class support to text sensor (#6202)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

tests/component_tests/text_sensor/test_text_sensor.py

@@ -0,0 +1,58 @@
+"""Tests for the text sensor component."""
+
+
+def test_text_sensor_is_setup(generate_main):
+    """
+    When the text is set in the yaml file, it should be registered in main
+    """
+    # Given
+
+    # When
+    main_cpp = generate_main("tests/component_tests/text_sensor/test_text_sensor.yaml")
+
+    # Then
+    assert "new template_::TemplateTextSensor();" in main_cpp
+    assert "App.register_text_sensor" in main_cpp
+
+
+def test_text_sensor_sets_mandatory_fields(generate_main):
+    """
+    When the mandatory fields are set in the yaml, they should be set in main
+    """
+    # Given
+
+    # When
+    main_cpp = generate_main("tests/component_tests/text_sensor/test_text_sensor.yaml")
+
+    # Then
+    assert 'ts_1->set_name("Template Text Sensor 1");' in main_cpp
+    assert 'ts_2->set_name("Template Text Sensor 2");' in main_cpp
+    assert 'ts_3->set_name("Template Text Sensor 3");' in main_cpp
+
+
+def test_text_sensor_config_value_internal_set(generate_main):
+    """
+    Test that the "internal" config value is correctly set
+    """
+    # Given
+
+    # When
+    main_cpp = generate_main("tests/component_tests/text_sensor/test_text_sensor.yaml")
+
+    # Then
+    assert "ts_2->set_internal(true);" in main_cpp
+    assert "ts_3->set_internal(false);" in main_cpp
+
+
+def test_text_sensor_device_class_set(generate_main):
+    """
+    When the device_class of text_sensor is set in the yaml file, it should be registered in main
+    """
+    # Given
+
+    # When
+    main_cpp = generate_main("tests/component_tests/text_sensor/test_text_sensor.yaml")
+
+    # Then
+    assert 'ts_2->set_device_class("timestamp");' in main_cpp
+    assert 'ts_3->set_device_class("date");' in main_cpp

tests/component_tests/text_sensor/test_text_sensor.yaml

@@ -0,0 +1,26 @@
+---
+esphome:
+  name: test
+  platform: ESP8266
+  board: d1_mini_lite
+
+text_sensor:
+  - platform: template
+    id: ts_1
+    name: "Template Text Sensor 1"
+    lambda: |-
+      return {"Hello World"};
+  - platform: template
+    id: ts_2
+    name: "Template Text Sensor 2"
+    lambda: |-
+      return {"2023-06-22T18:43:52+00:00"};
+    device_class: timestamp
+    internal: true
+  - platform: template
+    id: ts_3
+    name: "Template Text Sensor 3"
+    lambda: |-
+      return {"2023-06-22T18:43:52+00:00"};
+    device_class: date
+    internal: false