// 3rd_party_lib:formula/target/release/formula
//3rd_party_lib_ohos:formula\target\aarch64-linux-ohos\release\formula
import formula.*
import std.unittest.*
import std.collection.*
import std.fs.*

@Test
public class later_test {
    @TestCase
    func later_test02(): Unit {

    var latex = LaTeX("res")
    var str = ###"
\begin{array}{l}\forall\varepsilon\in\mathbb{R}_+^*\ \exists\eta>0\ |x-x_0|\leq\eta\Longrightarrow|f(x)-f(x_0)|\leq\varepsilon\\\det\begin{bmatrix}a_{11}&a_{12}&\cdots&a_{1n}\\a_{21}&\ddots&&\vdots\\\vdots&&\ddots&\vdots\\a_{n1}&\cdots&\cdots&a_{nn}\end{bmatrix}\overset{\mathrm{def}}{=}\sum_{\sigma\in\mathfrak{S}_n}\varepsilon(\sigma)\prod_{k=1}^n a_{k\sigma(k)}\\\sideset{_\alpha^\beta}{_\gamma^\delta}{\begin{pmatrix}a&b\\c&d\end{pmatrix}}\\\int_0^\infty{x^{2n} e^{-a x^2}\,dx} = \frac{2n-1}{2a} \int_0^\infty{x^{2(n-1)} e^{-a x^2}\,dx} = \frac{(2n-1)!!}{2^{n+1}} \sqrt{\frac{\pi}{a^{2n+1}}}\\\int_a^b{f(x)\,dx} = (b - a) \sum\limits_{n = 1}^\infty  {\sum\limits_{m = 1}^{2^n  - 1} {\left( { - 1} \right)^{m + 1} } } 2^{ - n} f(a + m\left( {b - a} \right)2^{-n} )\\\int_{-\pi}^{\pi} \sin(\alpha x) \sin^n(\beta x) dx = \textstyle{\left \{ \begin{array}{cc} (-1)^{(n+1)/2} (-1)^m \frac{2 \pi}{2^n} \binom{n}{m} & n \mbox{ odd},\ \alpha = \beta (2m-n) \\ 0 & \mbox{otherwise} \\ \end{array} \right .}\\L = \int_a^b \sqrt{ \left|\sum_{i,j=1}^ng_{ij}(\gamma(t))\left(\frac{d}{dt}x^i\circ\gamma(t)\right)\left(\frac{d}{dt}x^j\circ\gamma(t)\right)\right|}\,dt\\\begin{array}{rl} s &= \int_a^b\left\|\frac{d}{dt}\vec{r}\,(u(t),v(t))\right\|\,dt \\ &= \int_a^b \sqrt{u'(t)^2\,\vec{r}_u\cdot\vec{r}_u + 2u'(t)v'(t)\, \vec{r}_u\cdot\vec{r}_v+ v'(t)^2\,\vec{r}_v\cdot\vec{r}_v}\,\,\, dt. \end{array}\\\end{array}
"###
    var r = latex.parse(str, 2000000000, 40.0, 10.0, 0xFF000000)        
    var w = r.getWidth()
    var h = r.getHeight()
    println(w)
    println(h)
     var g2 = Graphic2D(r,COLOR_FORMAT_BGRA_8888)
    r.draw(g2, 0xFFFFFFFF)
    var arr = r.toBitmap(g2)
    var file: File = File("test.bmp", OpenOption.CreateOrTruncate(false))
    file.write(arr)
    file.close()

    }
}