Implemented postgres generator comment tests

https://github.com/go-jet/jet-test-data/pull/6

tests/postgres/generator_test.go

@@ -604,6 +604,7 @@ func TestGeneratedAllTypesSQLBuilderFiles(t *testing.T) {
 		"mood.go", "person.go", "person_phone.go", "weird_names_table.go", "level.go", "user.go", "floats.go", "people.go",
 		"components.go", "vulnerabilities.go", "all_types_materialized_view.go", "sample_ranges.go")
 	testutils.AssertFileContent(t, modelDir+"/all_types.go", allTypesModelContent)
+	testutils.AssertFileContent(t, modelDir+"/link.go", linkModelContent)
 
 	testutils.AssertFileNamesEqual(t, tableDir, "all_types.go", "employee.go", "link.go",
 		"person.go", "person_phone.go", "weird_names_table.go", "user.go", "floats.go", "people.go", "table_use_schema.go",
@@ -611,6 +612,8 @@ func TestGeneratedAllTypesSQLBuilderFiles(t *testing.T) {
 	testutils.AssertFileContent(t, tableDir+"/all_types.go", allTypesTableContent)
 	testutils.AssertFileContent(t, tableDir+"/sample_ranges.go", sampleRangeTableContent)
 
+	testutils.AssertFileContent(t, tableDir+"/link.go", linkTableContent)
+
 	testutils.AssertFileNamesEqual(t, viewDir, "all_types_materialized_view.go", "all_types_view.go",
 		"view_use_schema.go")
 }
@@ -650,6 +653,7 @@ package enum
 
 import "github.com/go-jet/jet/v2/postgres"
 
+// Level enum
 var Level = &struct {
 	Level1 postgres.StringExpression
 	Level2 postgres.StringExpression
@@ -747,6 +751,25 @@ type AllTypes struct {
 }
 `
 
+var linkModelContent = `
+//
+// Code generated by go-jet DO NOT EDIT.
+//
+// WARNING: Changes to this file may cause incorrect behavior
+// and will be lost if the code is regenerated
+//
+
+package model
+
+// Link table
+type Link struct {
+	ID          int64   ` + "`sql:\"primary_key\"`" + ` // this is link id
+	URL         string  // link url
+	Name        string  // Unicode characters comment ₲鬼佬℧⇄↻
+	Description *string // '"Z\%_
+}
+`
+
 var allTypesTableContent = `
 //
 // Code generated by go-jet DO NOT EDIT.
@@ -1103,3 +1126,91 @@ func newSampleRangesTableImpl(schemaName, tableName, alias string) sampleRangesT
 	}
 }
 `
+
+var linkTableContent = `
+//
+// Code generated by go-jet DO NOT EDIT.
+//
+// WARNING: Changes to this file may cause incorrect behavior
+// and will be lost if the code is regenerated
+//
+
+package table
+
+import (
+	"github.com/go-jet/jet/v2/postgres"
+)
+
+var Link = newLinkTable("test_sample", "link", "")
+
+// Link table
+type linkTable struct {
+	postgres.Table
+
+	// Columns
+	ID          postgres.ColumnInteger // this is link id
+	URL         postgres.ColumnString  // link url
+	Name        postgres.ColumnString  // Unicode characters comment ₲鬼佬℧⇄↻
+	Description postgres.ColumnString  // '"Z\%_
+
+	AllColumns     postgres.ColumnList
+	MutableColumns postgres.ColumnList
+}
+
+type LinkTable struct {
+	linkTable
+
+	EXCLUDED linkTable
+}
+
+// AS creates new LinkTable with assigned alias
+func (a LinkTable) AS(alias string) *LinkTable {
+	return newLinkTable(a.SchemaName(), a.TableName(), alias)
+}
+
+// Schema creates new LinkTable with assigned schema name
+func (a LinkTable) FromSchema(schemaName string) *LinkTable {
+	return newLinkTable(schemaName, a.TableName(), a.Alias())
+}
+
+// WithPrefix creates new LinkTable with assigned table prefix
+func (a LinkTable) WithPrefix(prefix string) *LinkTable {
+	return newLinkTable(a.SchemaName(), prefix+a.TableName(), a.TableName())
+}
+
+// WithSuffix creates new LinkTable with assigned table suffix
+func (a LinkTable) WithSuffix(suffix string) *LinkTable {
+	return newLinkTable(a.SchemaName(), a.TableName()+suffix, a.TableName())
+}
+
+func newLinkTable(schemaName, tableName, alias string) *LinkTable {
+	return &LinkTable{
+		linkTable: newLinkTableImpl(schemaName, tableName, alias),
+		EXCLUDED:  newLinkTableImpl("", "excluded", ""),
+	}
+}
+
+func newLinkTableImpl(schemaName, tableName, alias string) linkTable {
+	var (
+		IDColumn          = postgres.IntegerColumn("id")
+		URLColumn         = postgres.StringColumn("url")
+		NameColumn        = postgres.StringColumn("name")
+		DescriptionColumn = postgres.StringColumn("description")
+		allColumns        = postgres.ColumnList{IDColumn, URLColumn, NameColumn, DescriptionColumn}
+		mutableColumns    = postgres.ColumnList{URLColumn, NameColumn, DescriptionColumn}
+	)
+
+	return linkTable{
+		Table: postgres.NewTable(schemaName, tableName, alias, allColumns...),
+
+		//Columns
+		ID:          IDColumn,
+		URL:         URLColumn,
+		Name:        NameColumn,
+		Description: DescriptionColumn,
+
+		AllColumns:     allColumns,
+		MutableColumns: mutableColumns,
+	}
+}
+`