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diff --git a/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/commands/TestScriptExecutor.java b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/commands/TestScriptExecutor.java
new file mode 100644
index 000000000..ab39d538a
--- /dev/null
+++ b/bundles/org.simantics.scl.compiler/src/org/simantics/scl/compiler/commands/TestScriptExecutor.java
@@ -0,0 +1,91 @@
+package org.simantics.scl.compiler.commands;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+
+import org.junit.Assert;
+import org.simantics.scl.runtime.reporting.AbstractSCLReportingHandler;
+import org.simantics.scl.runtime.reporting.SCLReportingHandler;
+
+public class TestScriptExecutor {
+
+    private final CommandSession session;
+    private final BufferedReader reader;
+    private final SCLReportingHandler handler;
+    
+    public TestScriptExecutor(CommandSession session, BufferedReader reader, SCLReportingHandler handler) {
+        this.session = session;
+        this.reader = reader;
+        this.handler = handler == null ? SCLReportingHandler.DEFAULT : handler;
+    }
+
+    public void execute() throws IOException {
+        StringBuilder command = new StringBuilder();
+        StringBuilder response = new StringBuilder();
+        while(true) {
+            // Read command
+            while(true) {
+                String line = reader.readLine();
+                if(line == null) {
+                    execute(command.toString(), response.toString());
+                    return;
+                }
+                else if(line.startsWith("> "))
+                    command.append(line.substring(2)).append('\n');
+                else {
+                    response.append(line).append('\n');
+                    break;
+                }
+            }
+            
+            // Read response
+            while(true) {
+                String line = reader.readLine();
+                if(line == null) {
+                    execute(command.toString(), response.toString());
+                    return;
+                }
+                else if(line.startsWith("> ")) {
+                    execute(command.toString(), response.toString());
+                    command = new StringBuilder();
+                    response = new StringBuilder();
+                    command.append(line.substring(2)).append('\n');
+                    break;
+                }
+                else
+                    response.append(line).append('\n');
+            }
+        }
+    }
+
+    private void execute(String command, String expectedResponse) {
+        final StringBuilder actualResponse = new StringBuilder();
+        final StringBuilder errors = new StringBuilder();
+        session.execute(command,
+                new AbstractSCLReportingHandler() {
+                    
+                    @Override
+                    public void print(String text) {
+                        handler.print(text);
+                        actualResponse.append(text).append('\n');
+                    }
+                    
+                    @Override
+                    public void printError(String error) {
+                        handler.printError(error);
+                        errors.append(error).append('\n');
+                    }
+                    
+                    @Override
+                    public void printCommand(String command) {
+                        handler.printCommand(command);
+                    }
+                });
+        if(errors.length() > 0)
+            Assert.fail("Command '" + command.trim() + "' produced error " + errors.toString().trim() + ".");
+        String expected = expectedResponse.trim().replaceAll("\\r", "");
+        String actual = actualResponse.toString().trim().replaceAll("\\r", "");
+        Assert.assertEquals(expected, actual);
+    }
+    
+}