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module fluentasserts.core.expect;
import fluentasserts.core.lifecycle;
import fluentasserts.core.evaluation;
import fluentasserts.core.results;
import fluentasserts.core.serializers;
import std.traits;
import std.string;
import std.uni;
import std.conv;
///
@safe struct Expect {
private {
Evaluation evaluation;
int refCount;
}
this(ValueEvaluation value, const string fileName, const size_t line, string prependText = null) @trusted {
this.evaluation = new Evaluation();
evaluation.id = Lifecycle.instance.beginEvaluation(value);
evaluation.currentValue = value;
evaluation.message = new MessageResult();
evaluation.source = new SourceResult(fileName, line);
try {
auto sourceValue = evaluation.source.getValue;
if(sourceValue == "") {
evaluation.message.startWith(evaluation.currentValue.niceValue);
} else {
evaluation.message.startWith(sourceValue);
}
} catch(Exception) {
evaluation.message.startWith(evaluation.currentValue.strValue);
}
evaluation.message.addText(" should");
if(prependText) {
evaluation.message.addText(prependText);
}
}
this(ref return scope Expect another) {
this.evaluation = another.evaluation;
this.refCount = another.refCount + 1;
}
~this() {
refCount--;
if(refCount < 0) {
evaluation.message.addText(" ");
evaluation.message.addText(evaluation.operationName.toNiceOperation);
if(evaluation.expectedValue.niceValue) {
evaluation.message.addText(" ");
evaluation.message.addValue(evaluation.expectedValue.niceValue);
} else if(evaluation.expectedValue.strValue) {
evaluation.message.addText(" ");
evaluation.message.addValue(evaluation.expectedValue.strValue);
}
Lifecycle.instance.endEvaluation(evaluation);
}
}
string msg(const size_t line = __LINE__, const string file = __FILE__) @trusted {
if(this.thrown is null) {
throw new Exception("There were no thrown exceptions", file, line);
}
return this.thrown.message.to!string;
}
Expect withMessage(const size_t line = __LINE__, const string file = __FILE__) {
addOperationName("withMessage");
return this;
}
Expect withMessage(string message, const size_t line = __LINE__, const string file = __FILE__) {
addOperationName("withMessage");
return this.equal(message);
}
Throwable thrown() {
Lifecycle.instance.endEvaluation(evaluation);
return evaluation.throwable;
}
///
Expect to() {
return this;
}
///
Expect be () {
evaluation.message.addText(" be");
return this;
}
///
Expect not() {
evaluation.isNegated = !evaluation.isNegated;
evaluation.message.addText(" not");
return this;
}
///
auto throwAnyException() {
return opDispatch!"throwAnyException";
}
///
Expect throwException(Type)() {
this.evaluation.expectedValue.meta["exceptionType"] = fullyQualifiedName!Type;
this.evaluation.expectedValue.meta["throwableType"] = fullyQualifiedName!Type;
return opDispatch!"throwException"(fullyQualifiedName!Type);
}
auto because(string reason) {
evaluation.message.prependText("Because " ~ reason ~ ", ");
return this;
}
///
auto equal(T)(T value) {
return opDispatch!"equal"(value);
}
///
auto contain(T)(T value) {
return opDispatch!"contain"(value);
}
///
auto greaterThan(T)(T value) {
return opDispatch!"greaterThan"(value);
}
///
auto greaterOrEqualTo(T)(T value) {
return opDispatch!"greaterOrEqualTo"(value);
}
///
auto above(T)(T value) {
return opDispatch!"above"(value);
}
///
auto lessThan(T)(T value) {
return opDispatch!"lessThan"(value);
}
///
auto lessOrEqualTo(T)(T value) {
return opDispatch!"lessOrEqualTo"(value);
}
///
auto below(T)(T value) {
return opDispatch!"below"(value);
}
///
auto startWith(T)(T value) {
return opDispatch!"startWith"(value);
}
///
auto endWith(T)(T value) {
return opDispatch!"endWith"(value);
}
auto containOnly(T)(T value) {
return opDispatch!"containOnly"(value);
}
auto beNull() {
return opDispatch!"beNull";
}
auto instanceOf(Type)() {
return opDispatch!"instanceOf"(fullyQualifiedName!Type);
}
auto approximately(T, U)(T value, U range) {
return opDispatch!"approximately"(value, range);
}
auto between(T, U)(T value, U range) {
return opDispatch!"between"(value, range);
}
auto within(T, U)(T value, U range) {
return opDispatch!"within"(value, range);
}
void inhibit() {
this.refCount = int.max;
}
auto haveExecutionTime() {
this.inhibit;
auto result = expect(evaluation.currentValue.duration, evaluation.source.file, evaluation.source.line, " have execution time");
return result;
}
void addOperationName(string value) {
if(this.evaluation.operationName) {
this.evaluation.operationName ~= ".";
}
this.evaluation.operationName ~= value;
}
///
Expect opDispatch(string methodName)() {
addOperationName(methodName);
return this;
}
///
Expect opDispatch(string methodName, Params...)(Params params) if(Params.length > 0) {
addOperationName(methodName);
static if(Params.length > 0) {
auto expectedValue = params[0].evaluate.evaluation;
foreach(key, value; evaluation.expectedValue.meta) {
expectedValue.meta[key] = value;
}
evaluation.expectedValue = expectedValue;
}
static if(Params.length >= 1) {
static foreach (i, Param; Params) {
() @trusted { evaluation.expectedValue.meta[i.to!string] = SerializerRegistry.instance.serialize(params[i]); } ();
}
}
return this;
}
}
///
Expect expect(void delegate() callable, const string file = __FILE__, const size_t line = __LINE__, string prependText = null) @trusted {
ValueEvaluation value;
value.typeNames = [ "callable" ];
try {
if(callable !is null) {
callable();
} else {
value.typeNames = ["null"];
}
} catch(Exception e) {
value.throwable = e;
value.meta["Exception"] = "yes";
} catch(Throwable t) {
value.throwable = t;
value.meta["Throwable"] = "yes";
}
return Expect(value, file, line, prependText);
}
///
Expect expect(T)(lazy T testedValue, const string file = __FILE__, const size_t line = __LINE__, string prependText = null) @trusted {
return Expect(testedValue.evaluate.evaluation, file, line, prependText);
}
///
string toNiceOperation(string value) @safe nothrow {
string newValue;
foreach(index, ch; value) {
if(index == 0) {
newValue ~= ch.toLower;
continue;
}
if(ch == '.') {
newValue ~= ' ';
continue;
}
if(ch.isUpper && value[index - 1].isLower) {
newValue ~= ' ';
newValue ~= ch.toLower;
continue;
}
newValue ~= ch;
}
return newValue;
}
/// toNiceOperation converts to a nice and readable string
unittest {
expect("".toNiceOperation).to.equal("");
expect("a.b".toNiceOperation).to.equal("a b");
expect("aB".toNiceOperation).to.equal("a b");
}