add unit tests

Author: corentin-c

app/src/test/kotlin/com/github/corentinc/httpcodescats/ui/screens/httpcodedetails/HttpCodeDetailViewModelTest.kt

@@ -0,0 +1,35 @@
+package com.github.corentinc.httpcodescats.ui.screens.httpcodedetails
+
+import com.github.corentinc.httpcodescats.model.HttpCode
+import com.github.corentinc.httpcodescats.unconfinedTestDispatcherProvider
+import com.github.corentinc.httpcodescats.usecase.IHttpCodesUseCase
+import io.mockk.coEvery
+import io.mockk.mockk
+import kotlinx.coroutines.test.runTest
+import org.assertj.core.api.Assertions
+import org.junit.jupiter.api.Test
+
+class HttpCodeDetailViewModelTest {
+	private val dispatcherProvider = unconfinedTestDispatcherProvider()
+	private val httpCodesUseCase: IHttpCodesUseCase = mockk()
+
+	private val systemUnderTest = HttpCodeDetailViewModel(dispatcherProvider, httpCodesUseCase)
+
+	@Test
+	fun `test getHttpCodeDetails should return the result from the useCase and set loading to false`() = runTest {
+		// Given
+		val httpCode = 404
+		val expectedResult = mockk<HttpCode>()
+		coEvery {
+			httpCodesUseCase.getHttpCode(httpCode)
+		} returns expectedResult
+
+		// When
+		systemUnderTest.getHttpCodeDetails(httpCode)
+		val result = systemUnderTest.uiState.value
+
+		// Then
+		Assertions.assertThat(result.httpCode).isEqualTo(expectedResult)
+		Assertions.assertThat(result.isLoading).isFalse()
+	}
+}