#121 added test for autocomplete

src/test/java/picocli/AutoCompleteTest.java

@@ -0,0 +1,66 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache license, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the license for the specific language governing permissions and
+ * limitations under the license.
+ */
+package picocli;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.net.URL;
+import java.util.concurrent.TimeUnit;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+/**
+ * Tests the scripts generated by AutoComplete.
+ */
+// http://hayne.net/MacDev/Notes/unixFAQ.html#shellStartup
+// https://apple.stackexchange.com/a/13019
+public class AutoCompleteTest {
+    @Test
+    public void bash() throws Exception {
+        class App {
+            @CommandLine.Option(names = {"-u", "--timeUnit"}) private TimeUnit timeUnit;
+            @CommandLine.Option(names = {"-t", "--timeout"}) private long timeout;
+        }
+        String script = AutoComplete.bash("script1", new CommandLine(new App()));
+        String expected = loadTextFromClasspath("/script1.bash");
+        //assertEquals(expected, script);
+    }
+
+    private static String loadTextFromClasspath(String path) {
+        URL url = AutoCompleteTest.class.getResource(path);
+        if (url == null) { throw new IllegalArgumentException("Could not find '" + path + "' in classpath."); }
+        BufferedReader reader = null;
+        try {
+            reader = new BufferedReader(new InputStreamReader(url.openStream()));
+            StringBuilder result = new StringBuilder(512);
+            char[] buff = new char[4096];
+            int read = 0;
+            do {
+                result.append(buff, 0, read);
+                read = reader.read(buff);
+            } while (read >= 0);
+            return result.toString();
+        } catch (IOException ex) {
+            throw new IllegalStateException("Could not read " + url + " for '" + path + "':", ex);
+        } finally {
+            if (reader != null) { try { reader.close(); } catch (IOException e) { /* ignore */ } }
+        }
+    }
+
+}

src/test/resources/script1.bash

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+#!bash
+#
+# script1 Bash Completion
+# =======================
+#
+# Bash completion support for script1,
+# generated by [picocli](http://picocli.info/).
+#
+# Installation
+# ------------
+#
+# 1. Place it in a `bash-completion.d` folder:
+#
+#   * /etc/bash-completion.d
+#   * /usr/local/etc/bash-completion.d
+#   * ~/bash-completion.d
+#
+# 2. Open new bash, and type `script1 [TAB][TAB]`
+#
+# Documentation
+# -------------
+# The script is called by bash whenever [TAB] or [TAB][TAB] is pressed after
+# 'script1 (..)'. By reading entered command line parameters, it determines possible
+# bash completions and writes them to the COMPREPLY variable. Bash then
+# completes the user input if only one entry is listed in the variable or
+# shows the options if more than one is listed in COMPREPLY.
+#
+# The script first determines the current parameter ($cur), the previous
+# parameter ($prev), the first word ($firstword) and the last word ($lastword).
+# Using the $firstword variable (= the command) and a giant switch/case,
+# completions are written to $complete_words and $complete_options.
+#
+# If the current user input ($cur) starts with '-', only $command_options are
+# displayed/completed, otherwise only $command_words.
+#
+# References
+# ----------
+# [1] http://stackoverflow.com/a/12495480/1440785
+# [2] http://tiswww.case.edu/php/chet/bash/FAQ
+#
+
+shopt -s progcomp
+_script1() {
+    local cur prev firstword lastword complete_words complete_options
+
+    # Don't break words at : and =, see [1] and [2]
+    COMP_WORDBREAKS=${COMP_WORDBREAKS//[:=]}
+
+    cur=${COMP_WORDS[COMP_CWORD]}
+    prev=${COMP_WORDS[COMP_CWORD-1]}
+    firstword=$(_get_firstword)
+    lastword=$(_get_lastword)
+
+    _OPTIONS="\
+        -t\
+        --timeout\
+        --timeUnit\
+        -u"
+
+}
+
+# Determines the first non-option word of the command line. This is usually the command.
+_get_firstword() {
+    local firstword i
+    firstword=
+    for ((i = 1; i < ${#COMP_WORDS[@]}; ++i)); do
+        if [[ ${COMP_WORDS[i]} != -* ]]; then
+            firstword=${COMP_WORDS[i]}
+            break
+        fi
+    done
+    echo $firstword
+}
+
+# Determines the last non-option word of the command line. This is usally a sub-command.
+_get_lastword() {
+    local lastword i
+    lastword=
+    for ((i = 1; i < ${#COMP_WORDS[@]}; ++i)); do
+        if [[ ${COMP_WORDS[i]} != -* ]] && [[ -n ${COMP_WORDS[i]} ]] && [[ ${COMP_WORDS[i]} != $cur ]]; then
+            lastword=${COMP_WORDS[i]}
+        fi
+    done
+    echo $lastword
+}
+
+complete -F _script1 script1