fix: added some unit tests for vm

internals/vm/vm_test.go

@@ -0,0 +1,50 @@
+package vm
+
+import (
+	"godb/internals/buffer"
+	"testing"
+)
+
+var inputBuffer = buffer.NewInputBuffer()
+
+var statement = NewStatement()
+
+func comapareExpectedAndRetruned(t *testing.T, result, expectedResult PrepareResults, resultingStype, expectedStype statementType) {
+	if result != expectedResult && resultingStype == expectedStype {
+		t.Errorf("Expected prepareResult and stype to be: (%v, %v), got: (%v,%v)\n", expectedResult, expectedStype, result, resultingStype)
+	}
+}
+
+func TestPrepareStatementSelect(t *testing.T) {
+	inputBuffer.Buffer = "select"
+
+	result := statement.PrepareStatements(inputBuffer)
+
+	comapareExpectedAndRetruned(t, result, PrepareSuccess, statement.stype, StatementSelect)
+}
+
+func TestPrepareStatementInsert(t *testing.T) {
+	inputBuffer.Buffer = "insert 0 hello hello.com"
+
+	result := statement.PrepareStatements(inputBuffer)
+
+	comapareExpectedAndRetruned(t, result, PrepareSuccess, statement.stype, StatementInsert)
+}
+
+func TestPrepareStatementUnrecognized(t *testing.T) {
+	inputBuffer.Buffer = "something"
+
+	result := statement.PrepareStatements(inputBuffer)
+
+	comapareExpectedAndRetruned(t, result, PrepareUnrecognised, statement.stype, StatementUnrecognized)
+}
+
+func TestPrepareStatementSyntaxError(t *testing.T) {
+	inputBuffer.Buffer = "insert 0 hello"
+
+	result := statement.PrepareStatements(inputBuffer)
+
+	if result != PrepareSyntaxError {
+		t.Errorf("Expected prepareResult to be: %v, got: %v\n", PrepareSyntaxError, result)
+	}
+}