allow globbing, and extract queries from .go files

generate/testdata/parsing/fragments.go

@@ -0,0 +1,46 @@
+package parsing
+
+const MyFragment = `
+	# @genqlient
+	fragment MyFragment on MyType {
+		myFragmentField
+		...NestedFragment
+	}
+`
+
+var _ = `
+	# @genqlient
+	fragment NestedFragment on MyType {
+		myOtherFragmentField
+	}
+`
+
+const MyQuery = `
+	# @genqlient
+	query MyQuery {
+		myField
+		myOtherField {
+		...MyFragment
+		}
+	}
+`
+
+func query(s string) {}
+
+func MyMutation() {
+	query(`
+		# @genqlient
+		mutation MyMutation {
+			myField
+			myOtherField {
+			...MyFragment
+			}
+		}
+	`)
+}
+
+const (
+	NotAString = 1
+	NotAQuery  = `query
+		writing with GraphQL is fun!`
+)