[poincare] Add tests on symbols

Change-Id: I44329fb76dd84c1ef6b731d552c80615fc29d01d

poincare/Makefile

@@ -98,6 +98,7 @@ tests += $(addprefix poincare/test/,\
   power.cpp\
   simplify_utils.cpp\
   subtraction.cpp\
+  symbol.cpp\
   trigo.cpp\
 )
 

poincare/test/symbol.cpp

@@ -0,0 +1,54 @@
+#include <quiz.h>
+#include <poincare.h>
+#include <math.h>
+#include <ion.h>
+#include <assert.h>
+
+using namespace Poincare;
+
+QUIZ_CASE(poincare_parse_symbol) {
+  char piText[2] = {Ion::Charset::SmallPi, 0};
+  Expression * e = Expression::parse(piText);
+  assert(e->type() == Expression::Type::Symbol);
+  delete e;
+
+  char eText[2] = {Ion::Charset::Exponential, 0};
+  e = Expression::parse(eText);
+  assert(e->type() == Expression::Type::Symbol);
+  delete e;
+
+  char iText[10] = {Ion::Charset::IComplex, 0};
+  e = Expression::parse(iText);
+  assert(e->type() == Expression::Type::Complex);
+  delete e;
+
+  char floatText[10] = {'1', '.', '2', Ion::Charset::Exponent, '3', 0};
+  e = Expression::parse(floatText);
+  assert(e->type() == Expression::Type::Complex);
+  delete e;
+
+  e = Expression::parse("ans");
+  assert(e->type() == Expression::Type::Symbol);
+  delete e;
+}
+
+
+QUIZ_CASE(poincare_symbol_approximate) {
+  GlobalContext globalContext;
+  char piText[2] = {Ion::Charset::SmallPi, 0};
+  Expression * e = Expression::parse(piText);
+  assert(fabsf(e->approximate(globalContext)-M_PI) <= 0.0001f);
+  delete e;
+
+  char eText[2] = {Ion::Charset::Exponential, 0};
+  e = Expression::parse(eText);
+  assert(fabsf(e->approximate(globalContext)-M_E) <= 0.0001f);
+
+  delete e;
+
+  char floatText[10] = {'1', '.', '2', Ion::Charset::Exponent, '3', 0};
+  e = Expression::parse(floatText);
+  assert(fabsf(e->approximate(globalContext)-1200.0f) <= 0.0001f);
+  delete e;
+}
+