feat: add learner memory ingestion

internal/learnermemory/service_test.go

@@ -0,0 +1,91 @@
+package learnermemory
+
+import (
+	"testing"
+
+	"tutor/internal/workflows"
+)
+
+func TestApplyCandidateIgnoresUpdatesWithoutEvidence(t *testing.T) {
+	service := NewService(NewMemoryStore())
+	if _, err := service.EnsureProfile(ProfileInput{
+		UserID:     "user-1",
+		TargetRole: "junior backend developer",
+		Stack:      []string{"go"},
+	}); err != nil {
+		t.Fatalf("EnsureProfile error: %v", err)
+	}
+
+	err := service.ApplyCandidate(workflows.MemoryUpdateCandidate{
+		UserID: "user-1",
+		Updates: []workflows.MemoryUpdate{
+			{
+				Kind:          workflows.MemoryConceptMastery,
+				Concept:       workflows.ConceptRef{ID: "http-idempotency", Label: "HTTP idempotency"},
+				ProposedState: workflows.ReadinessImproving,
+				Summary:       "No evidence should not persist.",
+			},
+		},
+	})
+	if err != nil {
+		t.Fatalf("ApplyCandidate error: %v", err)
+	}
+
+	snapshot, err := service.Snapshot("user-1")
+	if err != nil {
+		t.Fatalf("Snapshot error: %v", err)
+	}
+	if len(snapshot.Mastery) != 0 {
+		t.Fatalf("mastery entries = %d, want 0", len(snapshot.Mastery))
+	}
+}
+
+func TestApplyCandidateStoresEvidenceBackedMemory(t *testing.T) {
+	service := NewService(NewMemoryStore())
+	if _, err := service.EnsureProfile(ProfileInput{
+		UserID:     "user-1",
+		TargetRole: "junior backend developer",
+		Stack:      []string{"go"},
+	}); err != nil {
+		t.Fatalf("EnsureProfile error: %v", err)
+	}
+
+	evidence := []workflows.EvidenceRef{{Kind: workflows.EvidenceAnswer, ID: "answer-1", Confidence: 1}}
+	err := service.ApplyCandidate(workflows.MemoryUpdateCandidate{
+		UserID: "user-1",
+		Updates: []workflows.MemoryUpdate{
+			{
+				Kind:          workflows.MemoryConceptMastery,
+				Concept:       workflows.ConceptRef{ID: "http-idempotency", Label: "HTTP idempotency"},
+				ProposedState: workflows.ReadinessInterviewReady,
+				Summary:       "Evidence-backed concept mastery.",
+				Evidence:      evidence,
+				Confidence:    0.8,
+			},
+			{
+				Kind:       workflows.MemoryReviewSchedule,
+				Concept:    workflows.ConceptRef{ID: "http-idempotency", Label: "HTTP idempotency"},
+				Summary:    "Review later.",
+				Evidence:   evidence,
+				Confidence: 0.7,
+			},
+		},
+	})
+	if err != nil {
+		t.Fatalf("ApplyCandidate error: %v", err)
+	}
+
+	snapshot, err := service.Snapshot("user-1")
+	if err != nil {
+		t.Fatalf("Snapshot error: %v", err)
+	}
+	if len(snapshot.Mastery) != 1 {
+		t.Fatalf("mastery entries = %d, want 1", len(snapshot.Mastery))
+	}
+	if len(snapshot.ReviewSchedule) != 1 {
+		t.Fatalf("review entries = %d, want 1", len(snapshot.ReviewSchedule))
+	}
+	if len(snapshot.Mastery[0].Evidence) != 1 {
+		t.Fatal("expected mastery evidence")
+	}
+}