[🤖] Add Unit-Tests

mongoext/projections_test.go

@@ -0,0 +1,90 @@
+package mongoext
+
+import (
+	"testing"
+
+	"git.blackforestbytes.com/BlackForestBytes/goext/tst"
+)
+
+func TestProjectionFromStructSimple(t *testing.T) {
+	type model struct {
+		ID   string `bson:"_id"`
+		Name string `bson:"name"`
+		Age  int    `bson:"age"`
+	}
+
+	res := ProjectionFromStruct(model{})
+
+	tst.AssertEqual(t, len(res), 3)
+	tst.AssertEqual(t, res["_id"], 1)
+	tst.AssertEqual(t, res["name"], 1)
+	tst.AssertEqual(t, res["age"], 1)
+}
+
+func TestProjectionFromStructIgnoresUntagged(t *testing.T) {
+	type model struct {
+		Tagged   string `bson:"tagged"`
+		Untagged string
+		Other    int `json:"other"`
+	}
+
+	res := ProjectionFromStruct(model{})
+
+	tst.AssertEqual(t, len(res), 1)
+	tst.AssertEqual(t, res["tagged"], 1)
+
+	if _, ok := res["Untagged"]; ok {
+		t.Errorf("untagged field should not be in projection")
+	}
+	if _, ok := res["Other"]; ok {
+		t.Errorf("non-bson-tagged field should not be in projection")
+	}
+}
+
+func TestProjectionFromStructWithOptions(t *testing.T) {
+	type model struct {
+		ID   string `bson:"_id,omitempty"`
+		Name string `bson:"name,omitempty"`
+		Slug string `bson:"slug,inline"`
+	}
+
+	res := ProjectionFromStruct(model{})
+
+	tst.AssertEqual(t, len(res), 3)
+	tst.AssertEqual(t, res["_id"], 1)
+	tst.AssertEqual(t, res["name"], 1)
+	tst.AssertEqual(t, res["slug"], 1)
+}
+
+func TestProjectionFromStructEmpty(t *testing.T) {
+	type empty struct{}
+
+	res := ProjectionFromStruct(empty{})
+
+	tst.AssertEqual(t, len(res), 0)
+}
+
+func TestProjectionFromStructPointerValues(t *testing.T) {
+	type model struct {
+		Name *string `bson:"name"`
+		Tags []int   `bson:"tags"`
+	}
+
+	res := ProjectionFromStruct(model{})
+
+	tst.AssertEqual(t, len(res), 2)
+	tst.AssertEqual(t, res["name"], 1)
+	tst.AssertEqual(t, res["tags"], 1)
+}
+
+func TestProjectionFromStructAllSkipped(t *testing.T) {
+	type model struct {
+		A string
+		B int
+		C bool
+	}
+
+	res := ProjectionFromStruct(model{})
+
+	tst.AssertEqual(t, len(res), 0)
+}