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package junitparams.naming;
import junitparams.internal.TestMethod;
import junitparams.internal.Utils;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Locale;
import java.util.regex.Pattern;
public class MacroSubstitutionNamingStrategy implements TestCaseNamingStrategy {
private static final String MACRO_PATTERN = "\\{[^\\}]{0,50}\\}";
// Pattern that keeps delimiters in split result
private static final Pattern MACRO_SPLIT_PATTERN = Pattern.compile(String.format("(?=%s)|(?<=%s)", MACRO_PATTERN, MACRO_PATTERN));
private static final String MACRO_START = "{";
private static final String MACRO_END = "}";
// Android-changed: CTS and AndroidJUnitRunner rely on specific format to test names, changing
// them will prevent CTS and AndroidJUnitRunner from working properly; see b/36541809
static final String DEFAULT_TEMPLATE = "{method}[{index}]";
private TestMethod method;
public MacroSubstitutionNamingStrategy(TestMethod testMethod) {
this.method = testMethod;
}
@Override
public String getTestCaseName(int parametersIndex, Object parameters) {
TestCaseName testCaseName = method.getAnnotation(TestCaseName.class);
String template = getTemplate(testCaseName);
String builtName = buildNameByTemplate(template, parametersIndex, parameters);
if (builtName.trim().isEmpty()) {
return buildNameByTemplate(DEFAULT_TEMPLATE, parametersIndex, parameters);
} else {
return builtName;
}
}
private String getTemplate(TestCaseName testCaseName) {
if (testCaseName != null) {
// Android-changed: CTS and AndroidJUnitRunner rely on specific format to test names,
// changing them will prevent CTS and AndroidJUnitRunner from working properly;
// see b/36541809
throw new IllegalStateException(
"@TestCaseName not currently supported as it breaks running tests in CTS");
// return testCaseName.value();
}
return DEFAULT_TEMPLATE;
}
private String buildNameByTemplate(String template, int parametersIndex, Object parameters) {
StringBuilder nameBuilder = new StringBuilder();
String[] parts = MACRO_SPLIT_PATTERN.split(template);
for (String part : parts) {
String transformedPart = transformPart(part, parametersIndex, parameters);
nameBuilder.append(transformedPart);
}
return nameBuilder.toString();
}
private String transformPart(String part, int parametersIndex, Object parameters) {
if (isMacro(part)) {
return lookupMacroValue(part, parametersIndex, parameters);
}
return part;
}
private String lookupMacroValue(String macro, int parametersIndex, Object parameters) {
String macroKey = getMacroKey(macro);
switch (Macro.parse(macroKey)) {
case INDEX: return String.valueOf(parametersIndex);
case PARAMS: return Utils.stringify(parameters);
case METHOD: return method.name();
default: return substituteDynamicMacro(macro, macroKey, parameters);
}
}
private String substituteDynamicMacro(String macro, String macroKey, Object parameters) {
if (isMethodParameterIndex(macroKey)) {
int index = parseIndex(macroKey);
return Utils.getParameterStringByIndexOrEmpty(parameters, index);
}
return macro;
}
private boolean isMethodParameterIndex(String macroKey) {
return macroKey.matches("\\d+");
}
private int parseIndex(String macroKey) {
return Integer.parseInt(macroKey);
}
private String getMacroKey(String macro) {
return macro
.substring(MACRO_START.length(), macro.length() - MACRO_END.length())
.toUpperCase(Locale.ENGLISH);
}
private boolean isMacro(String part) {
return part.startsWith(MACRO_START) && part.endsWith(MACRO_END);
}
private enum Macro {
INDEX,
PARAMS,
METHOD,
NONE;
public static Macro parse(String value) {
if (macros.contains(value)) {
return Macro.valueOf(value);
} else {
return Macro.NONE;
}
}
private static final HashSet<String> macros = new HashSet<String>(Arrays.asList(
Macro.INDEX.toString(), Macro.PARAMS.toString(), Macro.METHOD.toString())
);
}
}
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