test(MySQL): Add test for default column values

Refs: sqlc-dev#1197 sqlc-dev#1754

internal/engine/dolphin/catalog_test.go

@@ -0,0 +1,96 @@
+package dolphin
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+	"testing"
+
+	"github.com/kyleconroy/sqlc/internal/sql/sqlerr"
+
+	"github.com/google/go-cmp/cmp"
+)
+
+func TestUpdateErrors(t *testing.T) {
+	p := NewParser()
+	for i, tc := range []struct {
+		stmt string
+		err  *sqlerr.Error
+	}{
+		{
+			`
+                       CREATE TABLE foo (bar int);
+                       CREATE TABLE foo (bar int);
+                       `,
+			sqlerr.RelationExists("foo"),
+		},
+	} {
+		test := tc
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
+			stmts, err := p.Parse(strings.NewReader(test.stmt))
+			if err != nil {
+				t.Log(test.stmt)
+				t.Fatal(err)
+			}
+
+			c := NewCatalog()
+			err = c.Build(stmts)
+			if err == nil {
+				t.Log(test.stmt)
+				t.Fatal("err was nil")
+			}
+
+			var actual *sqlerr.Error
+			if !errors.As(err, &actual) {
+				t.Fatalf("err is not *sqlerr.Error: %#v", err)
+			}
+
+			if diff := cmp.Diff(test.err.Error(), actual.Error()); diff != "" {
+				t.Log(test.stmt)
+				t.Errorf("error mismatch: \n%s", diff)
+			}
+		})
+	}
+}
+
+func TestSuccessfulUpdate(t *testing.T) {
+	p := NewParser()
+	for i, tc := range []struct {
+		stmt string
+	}{
+		{
+			`
+                       CREATE TABLE authors (
+                               id   INT PRIMARY KEY,
+                               name text      NOT NULL,
+                               bio  text      NOT NULL DEFAULT (bio_func())
+                         );
+                       `,
+		},
+		{
+			`
+			CREATE TABLE IF NOT EXISTS organizations
+(
+    id VARCHAR(36) DEFAULT (UUID()) NOT NULL PRIMARY KEY
+);
+			`,
+		},
+	} {
+		test := tc
+		t.Run(strconv.Itoa(i), func(t *testing.T) {
+			stmts, err := p.Parse(strings.NewReader(test.stmt))
+			if err != nil {
+				t.Log(test.stmt)
+				t.Fatal(err)
+			}
+
+			c := NewCatalog()
+			err = c.Build(stmts)
+			if err != nil {
+				t.Log(test.stmt)
+				t.Log(err)
+				t.Fatal("err should have been nil")
+			}
+		})
+	}
+}