public ExpressionInfo build() {
SourceUnit unit = SourceUnit.create("Spec expression", adjustedText);
unit.parse();
unit.completePhase();
unit.convert();
BlockStatement blockStat = unit.getAST().getStatementBlock();
Assert.that(blockStat != null && blockStat.getStatements().size() == 1);
Statement stat = blockStat.getStatements().get(0);
Assert.that(stat instanceof ExpressionStatement);