Feat/environment variables in workflow (#6515)

Co-authored-by: JzoNg <jzongcode@gmail.com>

api/tests/unit_tests/app/test_segment.py

@@ -0,0 +1,53 @@
+from core.app.segments import SecretVariable, parser
+from core.helper import encrypter
+from core.workflow.entities.node_entities import SystemVariable
+from core.workflow.entities.variable_pool import VariablePool
+
+
+def test_segment_group_to_text():
+    variable_pool = VariablePool(
+        system_variables={
+            SystemVariable('user_id'): 'fake-user-id',
+        },
+        user_inputs={},
+        environment_variables=[
+            SecretVariable(name='secret_key', value='fake-secret-key'),
+        ],
+    )
+    variable_pool.add(('node_id', 'custom_query'), 'fake-user-query')
+    template = (
+        'Hello, {{#sys.user_id#}}! Your query is {{#node_id.custom_query#}}. And your key is {{#env.secret_key#}}.'
+    )
+    segments_group = parser.convert_template(template=template, variable_pool=variable_pool)
+
+    assert segments_group.text == 'Hello, fake-user-id! Your query is fake-user-query. And your key is fake-secret-key.'
+    assert (
+        segments_group.log
+        == f"Hello, fake-user-id! Your query is fake-user-query. And your key is {encrypter.obfuscated_token('fake-secret-key')}."
+    )
+
+
+def test_convert_constant_to_segment_group():
+    variable_pool = VariablePool(
+        system_variables={},
+        user_inputs={},
+        environment_variables=[],
+    )
+    template = 'Hello, world!'
+    segments_group = parser.convert_template(template=template, variable_pool=variable_pool)
+    assert segments_group.text == 'Hello, world!'
+    assert segments_group.log == 'Hello, world!'
+
+
+def test_convert_variable_to_segment_group():
+    variable_pool = VariablePool(
+        system_variables={
+            SystemVariable('user_id'): 'fake-user-id',
+        },
+        user_inputs={},
+        environment_variables=[],
+    )
+    template = '{{#sys.user_id#}}'
+    segments_group = parser.convert_template(template=template, variable_pool=variable_pool)
+    assert segments_group.text == 'fake-user-id'
+    assert segments_group.log == 'fake-user-id'

api/tests/unit_tests/app/test_variables.py

@@ -0,0 +1,91 @@
+import pytest
+from pydantic import ValidationError
+
+from core.app.segments import (
+    FloatVariable,
+    IntegerVariable,
+    SecretVariable,
+    SegmentType,
+    StringVariable,
+    factory,
+)
+
+
+def test_string_variable():
+    test_data = {'value_type': 'string', 'name': 'test_text', 'value': 'Hello, World!'}
+    result = factory.build_variable_from_mapping(test_data)
+    assert isinstance(result, StringVariable)
+
+
+def test_integer_variable():
+    test_data = {'value_type': 'number', 'name': 'test_int', 'value': 42}
+    result = factory.build_variable_from_mapping(test_data)
+    assert isinstance(result, IntegerVariable)
+
+
+def test_float_variable():
+    test_data = {'value_type': 'number', 'name': 'test_float', 'value': 3.14}
+    result = factory.build_variable_from_mapping(test_data)
+    assert isinstance(result, FloatVariable)
+
+
+def test_secret_variable():
+    test_data = {'value_type': 'secret', 'name': 'test_secret', 'value': 'secret_value'}
+    result = factory.build_variable_from_mapping(test_data)
+    assert isinstance(result, SecretVariable)
+
+
+def test_invalid_value_type():
+    test_data = {'value_type': 'unknown', 'name': 'test_invalid', 'value': 'value'}
+    with pytest.raises(ValueError):
+        factory.build_variable_from_mapping(test_data)
+
+
+def test_frozen_variables():
+    var = StringVariable(name='text', value='text')
+    with pytest.raises(ValidationError):
+        var.value = 'new value'
+
+    int_var = IntegerVariable(name='integer', value=42)
+    with pytest.raises(ValidationError):
+        int_var.value = 100
+
+    float_var = FloatVariable(name='float', value=3.14)
+    with pytest.raises(ValidationError):
+        float_var.value = 2.718
+
+    secret_var = SecretVariable(name='secret', value='secret_value')
+    with pytest.raises(ValidationError):
+        secret_var.value = 'new_secret_value'
+
+
+def test_variable_value_type_immutable():
+    with pytest.raises(ValidationError):
+        StringVariable(value_type=SegmentType.ARRAY, name='text', value='text')
+
+    with pytest.raises(ValidationError):
+        StringVariable.model_validate({'value_type': 'not text', 'name': 'text', 'value': 'text'})
+
+    var = IntegerVariable(name='integer', value=42)
+    with pytest.raises(ValidationError):
+        IntegerVariable(value_type=SegmentType.ARRAY, name=var.name, value=var.value)
+
+    var = FloatVariable(name='float', value=3.14)
+    with pytest.raises(ValidationError):
+        FloatVariable(value_type=SegmentType.ARRAY, name=var.name, value=var.value)
+
+    var = SecretVariable(name='secret', value='secret_value')
+    with pytest.raises(ValidationError):
+        SecretVariable(value_type=SegmentType.ARRAY, name=var.name, value=var.value)
+
+
+def test_build_a_blank_string():
+    result = factory.build_variable_from_mapping(
+        {
+            'value_type': 'string',
+            'name': 'blank',
+            'value': '',
+        }
+    )
+    assert isinstance(result, StringVariable)
+    assert result.value == ''