feat(tasks): define status graph and progress

2026-08-14 23:31:50 +07:00
parent 5967f7f70d
commit 17a3c5dc70
4 changed files with 193 additions and 0 deletions
@@ -0,0 +1,61 @@
+package com.lab.labtimesheet.tasks;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Stream;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+class TaskDomainRulesTest {
+
+    private static final Map<TaskStatus, Set<TaskStatus>> ALLOWED_TRANSITIONS = Map.of(
+            TaskStatus.TODO, Set.of(TaskStatus.IN_PROGRESS, TaskStatus.BLOCKED),
+            TaskStatus.IN_PROGRESS, Set.of(TaskStatus.DONE, TaskStatus.BLOCKED),
+            TaskStatus.BLOCKED, Set.of(TaskStatus.TODO, TaskStatus.IN_PROGRESS),
+            TaskStatus.DONE, Set.of(TaskStatus.IN_PROGRESS));
+
+    @ParameterizedTest
+    @MethodSource("allStatusTransitions")
+    void acceptsOnlyTheFixedStatusGraph(TaskStatus current, TaskStatus target, boolean expected) {
+        assertThat(current.canTransitionTo(target)).isEqualTo(expected);
+    }
+
+    @Test
+    void reportsNoPercentageForAProjectWithoutTasks() {
+        TaskProgress progress = TaskProgress.from(List.of());
+
+        assertThat(progress.completionPercentage()).isEmpty();
+        assertThat(progress.total()).isZero();
+        assertThat(progress.count(TaskStatus.DONE)).isZero();
+    }
+
+    @Test
+    void countsStatusesAndDonePercentageFromCurrentTasks() {
+        TaskProgress progress = TaskProgress.from(List.of(
+                TaskStatus.TODO,
+                TaskStatus.IN_PROGRESS,
+                TaskStatus.DONE,
+                TaskStatus.DONE));
+
+        assertThat(progress.completionPercentage()).hasValue(50);
+        assertThat(progress.total()).isEqualTo(4);
+        assertThat(progress.count(TaskStatus.TODO)).isEqualTo(1);
+        assertThat(progress.count(TaskStatus.IN_PROGRESS)).isEqualTo(1);
+        assertThat(progress.count(TaskStatus.BLOCKED)).isZero();
+        assertThat(progress.count(TaskStatus.DONE)).isEqualTo(2);
+    }
+
+    private static Stream<Arguments> allStatusTransitions() {
+        return Stream.of(TaskStatus.values())
+                .flatMap(current -> Stream.of(TaskStatus.values())
+                        .map(target -> Arguments.of(
+                                current,
+                                target,
+                                ALLOWED_TRANSITIONS.get(current).contains(target))));
+    }
+}