provide details for channel (work in progress, currently only shows channel id)

application/src/test/java/de/cotto/lndmanagej/controller/ChannelDetailsControllerTest.java

@@ -0,0 +1,45 @@
+package de.cotto.lndmanagej.controller;
+
+import de.cotto.lndmanagej.metrics.Metrics;
+import de.cotto.lndmanagej.service.ChannelService;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.mockito.InjectMocks;
+import org.mockito.Mock;
+import org.mockito.junit.jupiter.MockitoExtension;
+
+import java.util.Optional;
+
+import static de.cotto.lndmanagej.model.ChannelIdFixtures.CHANNEL_ID;
+import static de.cotto.lndmanagej.model.LocalOpenChannelFixtures.LOCAL_OPEN_CHANNEL;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+import static org.mockito.ArgumentMatchers.argThat;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+@ExtendWith(MockitoExtension.class)
+class ChannelDetailsControllerTest {
+    @InjectMocks
+    private ChannelDetailsController channelDetailsController;
+
+    @Mock
+    private ChannelService channelService;
+
+    @Mock
+    private Metrics metrics;
+
+    @Test
+    void getChannelDetails_channel_not_found() {
+        assertThatExceptionOfType(NotFoundException.class)
+                .isThrownBy(() -> channelDetailsController.getChannelDetails(CHANNEL_ID));
+    }
+
+    @Test
+    void getChannelDetails() throws NotFoundException {
+        when(channelService.getLocalChannel(CHANNEL_ID)).thenReturn(Optional.of(LOCAL_OPEN_CHANNEL));
+        assertThat(channelDetailsController.getChannelDetails(CHANNEL_ID))
+                .isEqualTo(new ChannelDetailsDto(CHANNEL_ID));
+        verify(metrics).mark(argThat(name -> name.endsWith(".getChannelDetails")));
+    }
+}