Refactor the Java acceptance test.

acceptance/java/TestConnection.java

@@ -0,0 +1,16 @@
+import java.sql.*;
+
+public class TestConnection {
+    public static Connection getConnection() {
+        Class.forName("org.postgresql.Driver");
+
+        String DB_URL = "jdbc:postgresql://";
+        DB_URL += System.getenv("PGHOST") + ":" + System.getenv("PGPORT");
+        DB_URL += "/?ssl=true";
+        DB_URL += "&sslcert=" + System.getenv("PGSSLCERT");
+        DB_URL += "&sslkey=key.pk8";
+        DB_URL += "&sslrootcert=/certs/ca.crt";
+        DB_URL += "&sslfactory=org.postgresql.ssl.jdbc4.LibPQFactory";
+        return DriverManager.getConnection(DB_URL);
+    }
+}

acceptance/java/TestPlaceholders.java

@@ -0,0 +1,27 @@
+import java.sql.*;
+
+public class TestStatements {
+    public static void runTests(Connection conn) throws Exception {
+        PreparedStatement stmt = conn.prepareStatement("SELECT 1, 2 > ?, ?::int, ?::string, ?::string, ?::string, ?::string, ?::string");
+        stmt.setInt(1, 3);
+        stmt.setInt(2, 3);
+        stmt.setBoolean(3, true);
+        stmt.setLong(4, -4L);
+        stmt.setFloat(5, 5.31f);
+        stmt.setDouble(6, -6.21d);
+        stmt.setShort(7, (short)7);
+
+        ResultSet rs = stmt.executeQuery();
+        rs.next();
+        int a = rs.getInt(1);
+        boolean b = rs.getBoolean(2);
+        int c = rs.getInt(3);
+        String d = rs.getString(4);
+        String e = rs.getString(5);
+        String f = rs.getString(6);
+        String g = rs.getString(7);
+        String h = rs.getString(8);
+        if (a != 1 || b != false || c != 3 || !d.equals("true") || !e.equals("-4") || !f.startsWith("5.3") || !g.startsWith("-6.2") || !h.equals("7")) {
+            throw new Exception("unexpected: round-trip of constants via SELECT does not preserve their value");
+        }
+}

acceptance/java/TestPlaceholdersFail.java

@@ -0,0 +1,12 @@
+import java.sql.*;
+
+public class TestStatements {
+    public static void runTests(Connection conn) throws Exception {
+        PreparedStatement stmt = conn.prepareStatement("SELECT 1, 2 > ?, ?::int");
+        stmt.setInt(1, 3);
+        stmt.setString(2, "a"); // invalid because wrong type
+
+        ResultSet rs = stmt.executeQuery();
+        rs.next();
+    }
+}

acceptance/java/main.java

@@ -0,0 +1,8 @@
+import java.sql.*;
+
+public class main {
+    public static void main(String[] args) throws Exception {
+        Connection conn = TestConnection.getConnection();
+        TestStatements.runTests(conn)
+    }
+}

acceptance/java/runjava.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+set -uex
+
+cd acceptance/java/
+
+# See: https://basildoncoder.com/blog/postgresql-jdbc-client-certificates.html
+openssl pkcs8 -topk8 -inform PEM -outform DER -in /certs/node.client.key -out key.pk8 -nocrypt
+
+export PATH=$PATH:/usr/lib/jvm/java-1.7-openjdk/bin
+
+cp -f "$1" TestConnection.java
+cp -f "$2" TestStatements.java
+
+javac main.java TestConnection.java TestStatements.java
+java -cp /postgres.jar:. main

acceptance/java_test.go

@@ -18,64 +18,10 @@
 
 package acceptance
 
-import (
-	"strings"
-	"testing"
-)
+import "testing"
 
 func TestDockerJava(t *testing.T) {
-	testDockerSuccess(t, "java", []string{"/bin/sh", "-c", strings.Replace(java, "%v", "Int(2, 3)", 1)})
-	testDockerFail(t, "java", []string{"/bin/sh", "-c", strings.Replace(java, "%v", `String(2, "a")`, 1)})
+	baseCmd := []string{"/bin/sh", "-c", "acceptance/java/runjava.sh"}
+	testDockerSuccess(t, "java", append(baseCmd, "TestConnection.java", "TestPlaceholders.java"))
+	testDockerFail(t, "java", append(baseCmd, "TestConnection.java", "TestPlaceholdersFail.java"))
 }
-
-const java = `
-set -e
-cat > main.java << 'EOF'
-import java.sql.*;
-
-public class main {
-	public static void main(String[] args) throws Exception {
-		Class.forName("org.postgresql.Driver");
-
-		String DB_URL = "jdbc:postgresql://";
-		DB_URL += System.getenv("PGHOST") + ":" + System.getenv("PGPORT");
-		DB_URL += "/?ssl=true";
-		DB_URL += "&sslcert=" + System.getenv("PGSSLCERT");
-		DB_URL += "&sslkey=key.pk8";
-		DB_URL += "&sslrootcert=/certs/ca.crt";
-		DB_URL += "&sslfactory=org.postgresql.ssl.jdbc4.LibPQFactory";
-		Connection conn = DriverManager.getConnection(DB_URL);
-
-		PreparedStatement stmt = conn.prepareStatement("SELECT 1, 2 > ?, ?::int, ?::string, ?::string, ?::string, ?::string, ?::string");
-		stmt.setInt(1, 3);
-		stmt.set%v;
-
-		stmt.setBoolean(3, true);
-		stmt.setLong(4, -4L);
-		stmt.setFloat(5, 5.31f);
-		stmt.setDouble(6, -6.21d);
-		stmt.setShort(7, (short)7);
-
-		ResultSet rs = stmt.executeQuery();
-		rs.next();
-		int a = rs.getInt(1);
-		boolean b = rs.getBoolean(2);
-		int c = rs.getInt(3);
-		String d = rs.getString(4);
-		String e = rs.getString(5);
-		String f = rs.getString(6);
-		String g = rs.getString(7);
-		String h = rs.getString(8);
-		if (a != 1 || b != false || c != 3 || !d.equals("true") || !e.equals("-4") || !f.startsWith("5.3") || !g.startsWith("-6.2") || !h.equals("7")) {
-			throw new Exception("unexpected");
-		}
-	}
-}
-EOF
-# See: https://basildoncoder.com/blog/postgresql-jdbc-client-certificates.html
-openssl pkcs8 -topk8 -inform PEM -outform DER -in /certs/node.client.key -out key.pk8 -nocrypt
-
-export PATH=$PATH:/usr/lib/jvm/java-1.7-openjdk/bin
-javac main.java
-java -cp /postgres.jar:. main
-`